Starting Operation; Working Advice - Bosch GOP 250 CE Professional Original Instructions Manual

OBJ_BUCH-1271-001.book Page 22 Thursday, July 8, 2010 10:58 AM
22 | English
Connecting the Dust Extraction (see figure A)
For sanding, always connect dust extraction.
Remove the application tool/accessory when
mounting the dust extraction 15 (accessory).
If required, assemble the parts of the dust ex-
traction 15 as shown in the figure. Position the
assembled dust extraction onto the machine via
the tool holder 4. Turn the dust extraction in
such a manner that the cams of the dust extrac-
tion engage into the corresponding recesses on
the housing. Fasten the dust extraction to the
machine with the retaining clip 13 as shown in
the figure.
Pay attention that the felt ring 12 is undamaged
and faces tightly against the sanding plate 10.
Replace a damage felt ring immediately.
Depending on machine version, place a vacuum
hose 16 (accessory) either directly onto the vac-
uum connection 14 or cut off the old hose end,
screw the extraction adapter 17 (accessory) on-
to the hose end and then place it directly onto
the vacuum connection 14. Connect the vacuum
hose 16 with a vacuum cleaner (accessory). An
overview for the connection of various vacuum
cleaners can be found on the fold-out page.
The vacuum cleaner must be suitable for the ma-
terial being worked.
When vacuuming dry dust that is especially det-
rimental to health or carcinogenic, use a special
vacuum cleaner.
Operation
Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.

Starting Operation

Switching On and Off
To start the machine, push the On/Off switch 1
forward so that the "I" is indicated on the switch.
To switch off the machine, push the On/Off
switch 1 toward the rear so that the "0" is indi-
cated on the switch.
2 609 140 769 | (8.7.10)
Preselecting the Orbital Stroke Rate
With the thumbwheel for preselection of the or-
bital stroke rate 2, you can preselect the required
orbital stroke rate, even during operation.
The required stroke rate depends on the materi-
al and the working conditions and can be deter-
mined through practical testing.

Working Advice

Note: Do not cover off the venting slots 3 of the
machine while working, as this reduces the
working life of the machine.
Operating Principle
Due to the oscillating drive the application
tool/accessory swings up to 20000 times per
minute for 2.8°. This allows for precise work in
narrow spaces.
Work with low and uniform appli-
cation pressure, otherwise, the
working performance will decline
and the application tool can be-
come blocked.
While working, move the machine
back and forth, so that the appli-
cation tool does not heat up ex-
cessively and become blocked.
Sawing
Use undamaged faultless saw blades only.
Deformed, blunt saw blades or saw blades
that are otherwise damaged can break.
When sawing light building materials, ob-
serve the statutory provisions and the rec-
ommendations of the material suppliers.
Plunge cuts may only be applied to soft ma-
terials, such as wood, gypsum plaster
boards, etc.!
Before sawing with HCS saw blades in wood,
particle board, building materials, etc., check
these for foreign objects such as nails, screws,
or similar. If required, remove foreign objects or
use BIM saw blades.
Bosch Power Tools